WALTHAM - Her boyfriend was supposed to pick her up at the airport, but never showed, so she took a cab to his apartment Monday afternoon and asked the landlord to let her in. There, the young woman found the bodies of her boyfriend and two other men, stabbed and covered in blood.

Screaming, she ran out of the house and into the street, where she shouted: “They’re dead. They’re all dead!” over and over, her cries piercing the still of a small, dead-end street.

“She said there was blood everywhere,” Meredith Langton, who lives next door and witnessed the scene, said yesterday. “She kept pacing back and forth, saying they were dead.”

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Authorities said yesterday they are waiting for the bodies to be positively identified. Autopsies are scheduled for today.

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